Corner-joint for screen-doors



Patented Oct. I8; |898. AYRES & 0. D. ELBEL.

CORNER JUINT FUR SCREEN DOORS.

(Application filed Nov. 13, 1897.) N 0 M o d e rlfll lll 344/0 Thom as/ly Elbe 0S wwZoLD.

....@Illl Preis..

THOMAS H. AYRES AND OSWALD D. ELBEL, OF SOUTH BEND, INDIANA.

coRNER-JOINT-Fon SCREEN-noone.

SPECIFICATION formingipart of Letters Patent N o. 612,452, dated OCOber18, 1898- Application iiled November 13, 1897. Serial No. 658.433. (Nomodel.)

To VMZ whom t may concern,.-

Be itknown that we, THOMAS H. AYRES and OsvvALn D. ELBEL, citizens ofthe YUnited States, residing at South Bend, in the county of St. Joseph,in the State of Indiana, have invented a new and useful Corner-Joint forScreen-Doors, of which the following is a specification.

Our invention relates to the frame of window or door screens, and moreespecially to r Vsingle piece of sheet metal bent to form two parallelplates adapted to be inserted in slots in the ends of the side frames, aconnectingbar being provided by the same bending, which when the bracketis placed in position will lie at an angle of forty-live degrees acrossthe corner-joint, ears being also formed to lie against the inner sideof the adjoining side and end bars of the frame and adapted to besecured thereto by nails or screws.

Our invention further consists in the improved construction,arrangement, and combination of parts hereinafter fully described andafterward specifically pointed out in the appended claims.

In order to enable others skilled in the art to which @our inventionmost nearly appertains to make and use the same, we will now proceed todescribe its construction and' op`A eration, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure l is a perspective view of the lower portion of a screendoorprovided with corner-brackets constructed in accordance with ourinvention. View illustrating the parts composing one corner-joint of aframe, the corner-bracket be` ing secured to one of the side bars andthe Fig. 2 is a detail perspective.

other side bar detached. Fig. 3 is a detail sectional view illustratinga corner-joint formed in accordance with our invention. Fig. L is adetail plan view of the sheet-metal blank from which our improvedcorner-bracket is formed.

Like letters of I reference mark the same parts wherever they occur inthe different iigures of the drawings.

Referring to the drawings by letters, A, B, and C indicate the bottomand side bars of a screen-door. -The adjoining ends of each of thesebars, as well as the fourth bar of the frame, (not herein shown,) aremitered, as shown at A and B in Fig. 2, and are further provided withparallel slits or saw-kerfs extending some distance into the bars, asclearly shown at A2 and B2.

D indicates our improved corner-bracket, which is composed of a singlepiece of' sheet metal of the shape indicated in Fig. 4, which issubstantially a square with portions cut out at diagonally oppositecorners.

In forming our improved corner -bracket the blank is bent on the brokenlines E E until the wings or portions F of the blank 4at an angle ofninety degrees to each other,

and in position when the bracket is secured to the side bars to lieagainst the inner side of the adjacent bars of the frame. In mak.- ing acorner-joint with our improved bracket the wings F F are slipped intothe saw-kerfs A2 and B2, which bringsv the connecting plate or bar Gin aposition at an angle of forty-five degrees to the two adjacent side barsof the frame, the interior bracket taking a position, as clearly shownin Fig. 1,'on the right hand. In this position the bracket is secured bymeans of nails I, passing through the framebar and the two win gs F F ofthe bracket and clenched on the opposite side, as clearly shown in Fig.3. The bracket is further secured and the corner further braced andstiifened by driving a nail J through each of the ears H into the barsagainst which these ears lie.

From the foregoing description of the construction and operation of ourinvention it Will be seen that we have produced a very simple, cheap,reliable, and durable cornerbraclret for screens or other frames Whichcan be readily attached or detached Without the necessity of employingskilled labor or any special tools and that a frame put together Withour improved corner-brackets Will securely maintain its position underall ordinary Wear and usage.

While We have illustrated and described thebest means now known to usfor carrying out our invention, We do not Wish to be understood asrestricting ourselves to the exact details of construction shown anddescribed, but hold that any slight changes or variations as mightsuggest themselves to the ordinary mechanic would properly fall Withinthe limit and scope of our invention.

Having thus fully described our invention, What We claim as new, anddesire to secure by Letters Patent of the United States, is-

1. lA corner-bracket for screen or similar frames constructed of. sheetmetal and comprising tWo parallel Wings connected together by aright-angled strip, said Wings being adapted to enter saW-kerfs in theframe-bars, and ears extending outwardly from the ends of theconnecting-strip and bent at angles of forty-five degrees to said strip,or ninety degrees to each other,substantially as described.

2. Acorner-j'ointforscreen or other frames comprising tWo adjacentmitered bars provided with parallel registering saW kerfs, acorner-bracket provided with parallel Wings secured in said sawkerfs andconnected together by a strip at right angles to the Wings extendingfrom one bar of the frame to the other across the corner at an angle offortyiive degrees, and ears projecting from the ends of saidconnecting-strip at an angle of about forty-iive degrees thereto andsecured to the inner faces of the adjacent bars of the frame,substantially as described.

THOMAS H. AYRES. OSVVALD D. ELBEL.

Witnesses:

ELMER E. BYERs, JACOB E. HENRY.

